Lighting-fixture construction



Jan. 26,1926. 1,570,930

' Y A. F. WAKEFIELD LIGHTING FIXTURE CONSTRUCTION Filed March 18; 1925 INVEN TOR.

A TTORNEKJ Patented Jan. 26, 1926,

units 's'rres PATENT OFFICE.

ALBERT F. WAKEFIELD, 0F VERMILXON, OETTIO, ASSIGNOR TO THE F. W. WAKEFIELD BRASS COMPANY, OF VERMILION, OHIO, A CORPORATION OF OHIO.

LIGHTING-FIXTURE CONSTRUCTION.

Application filed March 18, 1925. Serial No. 16,359.

To all whom it; may concern ventions.

The present invention relates to lighting fixtures and more particularly to constructional features therein which are provided in the fixture itself for adapting the fixture to proper sized lamps. In certain types of fixtures such as standard ceiling fixtures known as kitchen units, it has been found advisable to provide means in the fixture itself to limit the size of lamps which may normally be used therein, but to so arrange these means that they may be removed if necessary when the fixture is employed for other or special purposes. The present 111- vention more particularly relates to the provision of a baiiie plate or the like which 1s removably inserted in the fixture so as to adapt the latter to certain lamp sizes, the means for holding the device being normally concealed to prevent removal by persons not familiar with the construction, but readily removable by those who are familiar.

To the accoi'nplishment of the foregoing and related end said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawing and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawing Fig. 1 is a central vertical section through a fixture showing the parts in their normal position; Fig. 2 is a bottom plan view of the fixture with the globe and lamp removed; Fig. 3 IS a perspective vlew of the baffle plate; Fig. 4 is a perspective view of the holding ring; Fig. 5 is a bottom plan view showing the plate in position for removal or for final insertion; and Fig. 6 is a view similar to Fig. 5 but showing the position of the plate at the beginning of its removal or just prior to its final movement into position.

The present invention is shown as applled to ceiling fixture of the usual type consisting of a hollow shell 1 flared from the center to provide an upper portion 2 adapted to fit against the ceiling 3 to which it is secured by screws 4 or the likeextending through slots 5 in the holding bracket 6 which is mounted between the socket 7 and a1 plliate 8 mounted across the interior of the S16 c The lower half lOof the fixture is flared outwardly so as to be larger at the open bottom and is provided near the bottom with a horizontal shoulder 11 and a straight cylindrical flange 12 having an inturned lower edge 13 at the bottom. A deflector plate or baiiie 15 is mounted in the cylindri cal flange against the shoulder by means of a split locking ring 1.6 which is provided wlth an int-eriorly threaded nipple 1'7 and two spaced supporting lugs 18. V The ring fits snugly between the plate and the inturned edge of the cylindrical flange and the threaded nipple extends through an aperture 19 in the flange to hold the ring in position, a holding screw 20 being mounted through the nipple, which with the two lugs acts as'a support for the globe or shade 21.

As bestshown in Fig. 1 the baffle plate 15 has its center portion 25 cone shaped and extending downwardly andprovided with a central opening 26 through which the lamp 2? may be inserted to be threaded into its socket 7, the opening 26 in the cone being of a size to receive the neck of the lamp. The length of the cone and the size of the opening determine the size of lamp which may be used. As shown, it is necessary to employ a lamp having a neck 28 long enough to extend through the opening at the endof the cone and reach into the lamp socket.

The baffle plate 15 is substantially circular and of a size to fit rather snugly against the interior of the flange 12 when the plate is in use. At one point along the edge, the plate is cut off to provide a fiat portion 30 having a radialshoulder 31 which is bent downwardly as is bestshown in Fig. 3. The turned in edge 13 of the fixture flange is providedwith anotch 32 at one point and the plate is insertedin the fixture by sliding it half way into the fixture with the point opposite to the shoulder 31 in the notch and with the cut off portion 30 against the turned in edge and with the radial shoulder 31 overlapping the turned in edge as best shown in Fig. 5. By turning the plate in a clockwise direction as shown by the arrow on Fig. 5, it is back screwed into the holder with the radial shoulder finally dropping through the slot.

To remove the plate, the shoulder 31 is raised above the turned in flange edge in the position shown in Fig. 6, through the notch and the plate is then rotated in a counter clockwise direction as shown by the arrow on Fig. 6 through substantially onehalf revolution to the position shown in Fig. 5 when it may be slipped out of the fixture. hen in position in the fixture, the plate fits snugly and the locking ring conceals the edge of the plate so as to give the appearance of a rigid non-removable structure.

By the use of battle plates of different sizes the fixture may be fitted to receive only lamps of certain desired types, and the Plate will be inserted before the fixture is mounted in which position the method of mounting is diflicult to observe. With certain types of glassware and for certain purposes, it has been found highly desirable to prevent use of all but certain sizes of lamps and by means of the present device this end is accomplished in a standard fixture which can easily be converted by anyone familiar with the actual construction involved.

Other modes of applying the principle of my invention may be employed instead ot the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means beemployed.

I therefore particularly point out and distinctly claim as my invention:-

1. In a lighting fixture, the combination of an outer shell having an internally extending shoulder and tern'iinating in a globe holding flange below said shoulder, an apertured baflie plate removably mounted in said flange and against said shoulder, and a look ing ring adapted to be removably mounted on the inside of said flange and against the edge of said plate to conceal the latter.

2. In a lighting fixture, the combination of an outer shell having an internally extending shoulder and terminating in a globe holding flange below said shoulder, an apertured baiiie plate removably mounted in said flange and against said shoulder, a locking ring adapted to be removably mounted on the inside of said flange and against the edge of said plate to conceal the latter, and means for securing said locking ring in position in said flange.

8. In a lighting fixture, the combination of an outer shell having a horizontal annular shoulder and terminating in a cylindrical flange having an inturned lower edge; an apertured baflle plate removably mounted in said flange against said shoulder; and a locking ring adapted to fit between said inturned flange edge and said plate and snugly against the interior of said cylindrical flange to conceal the edge of said plate.

l. In a lighting fixture, the combination of an outer shell having a horizontal annular shoulder and terminating in a cylindrical flange having an inturned lower edge provided with a notch, an apertured baflle plate, circular in general shape and of a size adapted to snugly fit the interior of said cylindrical flange, means. on said plate adapted to co-operate with such notch in said inturned edge to allow said bailie' plate to be inserted and removed from said flange, and a locking ring adapted to fit between said inturned flange edge and said plate and snugly against the interior of said cylindrical flange to conceal the edge of said plate.

In a lighting fixture, the combination of an outer shell having a horizontal annular shoulder and terminating in a cylindrical flange having an inturned lower edge provided with a notch, an apertured baflic plate, circular in general shape and of a size adapted to snugly fit the interior of said cylindrical flange, said plate being cut oil' at one side so as to slide half way into said flange when the opposite side is inserted in said notch, and being adapted to be moved into said flange by being rotated through approximately one half a revolution, and a locking ring adapted to fit between said inturned flange edge and said plate and snugly against the interior of said cylindrical flange to conceal the edge of said plate.

6. In a lighting fixture, the combination of an outer shell having a horizontal annular shoulder and terminating in a cylindrical flange having an inturned lower edge; an apertured baflie plate removably mounted in said flange against said shoulder, said plate having a centrally disposed downwardly extending cone-shape portion adapted to determine the lamp size which may be used in said fixture, and a locking ring adapted to fit between said inturned flange edge and said plate and snugly against the interior of said cylindrical flange to conceal the edge of said plate. I

T. In a lighting fixture, the combination of a shell having a socket mounted therein, said shell having an annular horizontal shoulder near the bottom, and a downwardly extending cylindrical flange below said shoulder, the flange having an inturned edge provided at one point with a notch, a baffle plate removably mounted in said flange,

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id battle plate being circular and of a diameter substantially equal to the interior diameter of said flange but being cut ofl at one side a distance equal to he length of the inturned edge, and a split locking ring and globe holder removably mounted in said flange and adapted to fit snugly against said inturned edge and to hold said plate snugly against said shoulder, said ring being adapted to conceal the outer edge of said plate, said ring being provided with globe holding means.

8. In a lighting fixture, the combination of a shell having a socket mounted therein, said shell having an annular horizontal shoulder near the bottom, and a downward- .ly'cxtending cylindrical flange below said shoulder, the flange having an inturned edge provided at one point with a notch, a battle plate removably mounted in said flange, said baflle plate being circular and of a diameter substantially equal to the interior diameter of said flange but being cut off at one side a distance equal to the length of the inturned edge, said plate being insertable into said flange by moving said plate through said notch with the cutoff portion opposite thereto and then being back screwed through said notch into said shell, and a split locking ring and globe holder removably mounted in said flange and adapted to fit snugly against said inturned edge and to hold said plate snugly against said shoulder, said ring being adapted to conceal the outer edge of said plate and said ring being provided with globe holding means.

9. In a lighting fixture, the combination of a shell having a socket mounted therein, said shell having an annular horizontal shoulder near the bottom, and a downwardly extending cylindrical flange below said shoulder, the flange having an inturned edge provided at one point with a notch, a bafiie plate removably mounted in said flange, said batlie plate being circular and of a diameter substantially equal to the interior diameter of said flange but being cut off at one side a distance equal to the length of the inturned edge, said plate having the center portion formed into a downwardly extending truncated cone, thus providing an aperture of predetermined size spaced a predetermined distance below said socket to predetermine the lamp size which may be inserted into said socket, and a split locking ring and globe holder removably mounted in said flange and adapted to fit snugly against said inturned edge and to hold said plate snugly against said shoulder, said ring being adapted to conceal the outer edge of said plate, said ring being provided with globe holding means.

10. In a lighting fixture, the combination of a shell having a socket mounted therein, said shell having an annular horizontal shoulder near the bottom, and a downwardly extending cylindrical flange below said shoulder, the flange having an inturned edge provided at one point with a notch, a baifle plate removably mounted in said flange, said baifle plate being circular and of a diameter substantially equal to the interior diameter of said flange but being cut 011 at one side a distance equal to the length of the inturned edge, said plate having its center portion formed into a downwardly extending truncated cone, thus providing an aperture of predetermined size spaced a predetermined distance below said socket to pre determined the lamp size which may be inserted into said socket, and said plate being insertable into said flange by moving said plate through said notch with the cut-off portion opposite thereto, and then being back screwed through said notch into said shell, and a split locking ring and globe holder removably mounted in said flange and adapted to fit snugly against said in turned edge and to hold said plate snugly against said shoulder, said ring being adapted to conceal the outer edge of said plate, said ring being provided with globe holding means.

Signed by me, this 14-. day of March, 1925.

ALBERT F. VVAKEFlELI). 

